In a decree signed by Gen, uh-hah-hah-hah. G.K. Zhukov de army became part of de Red Army:

"The Stavka of de Supreme High Command orders:

1. Name de Separate Army formed by de Peopwe's Commissariat of Internaw Affairs of de USSR, consisting of six rifwe divisions, wif separate reinforcing and support units, de 70f Army and incwude it in de Red Army on 1 February.
2. Give de formations of de 70f Army de fowwowing designations:

3. Determine de numbering and tabwe of organization and composition of de units of 70f Army in accordance wif de instructions of de Chief of de Red Army Gwavupraform."[3]

The reinforcing and support units incwuded de 27f Separate Tank Regiment and 378f Anti-Tank Regiment.

70f Army was assigned to de re-depwoying Don Front (soon re-designated Centraw Front) under command of Gen, uh-hah-hah-hah. K.K. Rokossovsky. It was some time before Rokossovsky couwd knock it into shape as a front-wine formation, forcing him to remove many senior, ex-NKVD officers.[4] From 28 February de 70f Army took part in bof offensive and defensive operations to de nordwest of Kursk. Centraw Front expwoited a gap between de weak Second German Army and de Second Panzer Army, but was brought to a hawt by de spring rasputitsa, German reserves reweased by deir evacuation of de Rzhev Sawient, and de German counter-offensive to de souf. The Front's armies created defenses in depf during de wuww in operations during de spring.

During de Battwe of Kursk de 70f Army fought on de weft fwank of de 2nd Tank Army and pwayed a rowe in stopping de German 9f Army dat was trying to break drough to Kursk from de norf.[5] During de subseqwent Red Army counterattack, de 70f Army took part in Operation Kutuzov and attacked Trosna to de souf of de town of Kromy. On 5 Aug., its units reached de region soudwest of Kromy, and on 17 Aug., dey reached de German "Hagen" defense wine near Domakha.

After de end of dis operation, de fiewd headqwarters of de 70f Army was transferred to de Reserve of de Centraw Front and on 1 Feb. to STAVKA Reserve, where it received new units.

During de second hawf of February 1944, de 70f Army was transferred to de front at de Turya River norf of Kovew. On 25 Feb., it was subordinated to de Beworussian Front and on 16 Apr. it joined dat formation, which had been re-designated 1st Beworussian Front. In June, prior to de outbreak of de Soviet summer offensive, de Army was stiww in de vicinity of Kovew, and its order of battwe was as fowwows:

Wif just four rifwe divisions, dis was a smaww army by Soviet standards. It awso contained de 3rd Sniper Battawion, uh-hah-hah-hah.[6]

During de Lubwin–Brest Offensive (18 Juwy – 2 August), its units, awong wif units of de 61st Army and de 26f Army, surrounded Brest from de souf-east and destroyed up to four German divisions to de west of Brest.

After a short period assigned to de front reserves, on 10 Aug. de 70f Army attacked a region to de norf of Warsaw. By de end of August, it reached de Narew River near de town of Serock. As of 26 Aug. was reduced to just de 72nd Rifwe Corps.[7] On 29 Oct., de 70f Army was back again as reserves of de 1st Beworussian Front and on 19 Nov. as reserves of de 2nd Beworussian Front.

During de East Prussian Offensive (13 January to 25 Apriw), 70f Army attacked from de Serock bridgehead towards Modwin, Płock, and Toruń (Thorn). During dree days of fighting, its units broke drough de German defenses. On 18 January, dey captured Modwin and Modwin Fortress. On 25 January, ewements of 70f Army reached de fortified city of Toruń. At de same time oder units of 70f Army reached de Vistuwa River norf-east of Bromberg (Bydgoszcz) and crossed de river against opposition, uh-hah-hah-hah. On 10 February, de 70f Army reduced de defenders in Thorn, uh-hah-hah-hah. 70f Army, togeder wif oder armies of de front and forces of Bawtic Fweet, took part in de East Pomeranian Offensive (10 February – 4 Apriw 1945). The operation captured de city, port, and miwitary navaw base of Gdynia on 28 March and de navaw base at Danzig (Gdansk) on 30 March. In de beginning of Apriw 1945, 70f Army was transferred to de front reserve. At dis time de army had de 66f Guards SU Brigade attached, de Red Army's onwy heavy SU brigade, a potent force of 60 ISU-122 sewf-propewwed guns.[8] On 15 Apriw it was sent to de region of Wittstock, Naugard (Nowogard), and Sztuchow.

During de Battwe of Berwin (16 Apriw – 8 May), 70f Army was attached to de spearheads of 2nd Beworussian Front, attacking on de Neubrandenburg – Wismar axis. On 1 May, it captured de cities of Rostock and Teterow. On de evening of 3 May, its units reached de Bawtic Sea coastwine near Wismar and received orders to guard and defend de coastwine near Stettin (Szczecin).

After de war, de headqwarters of de Army was transferred to Chkawov (Orenburg). In October 1945, de fiewd headqwarters and its staff was used to create de headqwarters of de Souf Uraws Miwitary District.[9]